Add rpaas debug feature with custom image #136
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| // Copyright 2023 tsuru authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style | ||
| // license that can be found in the LICENSE file. | ||
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| package cmd | ||
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| import ( | ||
| "fmt" | ||
| "os" | ||
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| "github.com/gorilla/websocket" | ||
| "github.com/urfave/cli/v2" | ||
| "k8s.io/kubectl/pkg/util/term" | ||
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| rpaasclient "github.com/tsuru/rpaas-operator/pkg/rpaas/client" | ||
| ) | ||
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| func NewCmdDebug() *cli.Command { | ||
| return &cli.Command{ | ||
| Name: "debug", | ||
| Usage: "Run debug in an pod from instance", | ||
| ArgsUsage: "[-p POD] [-c CONTAINER] [--debug-image image] [--] COMMAND [args...]", | ||
| Flags: []cli.Flag{ | ||
| &cli.StringFlag{ | ||
| Name: "service", | ||
| Aliases: []string{"tsuru-service", "s"}, | ||
| Usage: "the Tsuru service name", | ||
| }, | ||
| &cli.StringFlag{ | ||
| Name: "instance", | ||
| Aliases: []string{"tsuru-service-instance", "i"}, | ||
| Usage: "the reverse proxy instance name", | ||
| Required: true, | ||
| }, | ||
| &cli.StringFlag{ | ||
| Name: "pod", | ||
| Aliases: []string{"p"}, | ||
| Usage: "pod name - if omitted, the first pod will be chosen", | ||
| }, | ||
| &cli.StringFlag{ | ||
| Name: "container", | ||
| Aliases: []string{"c"}, | ||
| Usage: "container name - if omitted, the \"nginx\" container will be chosen", | ||
| }, | ||
| &cli.StringFlag{ | ||
| Name: "debug-image", | ||
| Aliases: []string{"d"}, | ||
| Usage: "debug image name - if omitted, service default defined debug image will be chosen", | ||
| }, | ||
| &cli.BoolFlag{ | ||
| Name: "interactive", | ||
| Aliases: []string{"I", "stdin"}, | ||
| Usage: "pass STDIN to container", | ||
| }, | ||
| &cli.BoolFlag{ | ||
| Name: "tty", | ||
| Aliases: []string{"t"}, | ||
| Usage: "allocate a pseudo-TTY", | ||
| }, | ||
| }, | ||
| Before: setupClient, | ||
| Action: runDebug, | ||
| } | ||
| } | ||
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| func runDebug(c *cli.Context) error { | ||
| client, err := getClient(c) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| var width, height uint16 | ||
| if ts := term.GetSize(os.Stdin.Fd()); ts != nil { | ||
| width, height = ts.Width, ts.Height | ||
| } | ||
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| args := rpaasclient.DebugArgs{ | ||
| Command: c.Args().Slice(), | ||
| Instance: c.String("instance"), | ||
| Pod: c.String("pod"), | ||
| Container: c.String("container"), | ||
| Interactive: c.Bool("interactive"), | ||
| Image: c.String("debug-image"), | ||
| TTY: c.Bool("tty"), | ||
| TerminalWidth: width, | ||
| TerminalHeight: height, | ||
| } | ||
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| if args.Interactive { | ||
| args.In = os.Stdin | ||
| } | ||
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| tty := &term.TTY{ | ||
| In: args.In, | ||
| Out: c.App.Writer, | ||
| Raw: args.TTY, | ||
| } | ||
| return tty.Safe(func() error { | ||
| conn, err := client.Debug(c.Context, args) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer conn.Close() | ||
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| done := make(chan error, 1) | ||
| go func() { | ||
| defer close(done) | ||
| for { | ||
| mtype, message, nerr := conn.ReadMessage() | ||
| if nerr != nil { | ||
| closeErr, ok := nerr.(*websocket.CloseError) | ||
| if !ok { | ||
| done <- fmt.Errorf("ERROR: receveid an unexpected error while reading messages: %w", err) | ||
|
There was a problem hiding this comment. Small typo: |
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| return | ||
| } | ||
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| switch closeErr.Code { | ||
| case websocket.CloseNormalClosure: | ||
| case websocket.CloseInternalServerErr: | ||
| done <- fmt.Errorf("ERROR: the command may not be executed as expected - reason: %s", closeErr.Text) | ||
| default: | ||
| done <- fmt.Errorf("ERROR: unexpected close error: %s", closeErr.Error()) | ||
| } | ||
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| return | ||
| } | ||
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| switch mtype { | ||
| case websocket.TextMessage, websocket.BinaryMessage: | ||
| c.App.Writer.Write(message) | ||
| } | ||
| } | ||
| }() | ||
| err = <-done | ||
| conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, "")) | ||
| return err | ||
| }) | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| // Copyright 2023 tsuru authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style | ||
| // license that can be found in the LICENSE file. | ||
|
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| package cmd | ||
|
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| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
| "testing" | ||
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| "github.com/gorilla/websocket" | ||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
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| "github.com/tsuru/rpaas-operator/pkg/rpaas/client" | ||
| "github.com/tsuru/rpaas-operator/pkg/rpaas/client/fake" | ||
| ) | ||
|
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| func TestDebug(t *testing.T) { | ||
| var called bool | ||
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| tests := []struct { | ||
| name string | ||
| args []string | ||
| expected string | ||
| expectedError string | ||
| expectedCalled bool | ||
| client client.Client | ||
| }{ | ||
| { | ||
| name: "with command and arguments", | ||
| args: []string{"rpaasv2", "debug", "-s", "rpaasv2", "-i", "my-instance", "--", "my-command", "-arg1", "--arg2"}, | ||
| client: &fake.FakeClient{ | ||
| FakeDebug: func(ctx context.Context, args client.DebugArgs) (*websocket.Conn, error) { | ||
| called = true | ||
| expected := client.DebugArgs{ | ||
| Command: []string{"my-command", "-arg1", "--arg2"}, | ||
| Instance: "my-instance", | ||
| } | ||
| assert.Equal(t, expected, args) | ||
| return nil, fmt.Errorf("some error") | ||
| }, | ||
| }, | ||
| expectedCalled: true, | ||
| expectedError: "some error", | ||
| }, | ||
| { | ||
| name: "with all options activated", | ||
| args: []string{"rpaasv2", "debug", "-s", "rpaasv2", "-i", "my-instance", "--tty", "--interactive", "-p", "pod-1", "-c", "container-1", "--", "my-shell"}, | ||
| client: &fake.FakeClient{ | ||
| FakeDebug: func(ctx context.Context, args client.DebugArgs) (*websocket.Conn, error) { | ||
| called = true | ||
| expected := client.DebugArgs{ | ||
| In: os.Stdin, | ||
| Command: []string{"my-shell"}, | ||
| Instance: "my-instance", | ||
| Pod: "pod-1", | ||
| Container: "container-1", | ||
| TTY: true, | ||
| Interactive: true, | ||
| } | ||
| assert.Equal(t, expected, args) | ||
| return nil, fmt.Errorf("another error") | ||
| }, | ||
| }, | ||
| expectedCalled: true, | ||
| expectedError: "another error", | ||
| }, | ||
| } | ||
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| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| called = false | ||
| stdout := &bytes.Buffer{} | ||
| stderr := &bytes.Buffer{} | ||
| app := NewApp(stdout, stderr, tt.client) | ||
| err := app.Run(tt.args) | ||
| if tt.expectedError != "" { | ||
| assert.EqualError(t, err, tt.expectedError) | ||
| return | ||
| } | ||
| require.NoError(t, err) | ||
| assert.Equal(t, tt.expectedCalled, called) | ||
| assert.Equal(t, tt.expected, stdout.String()) | ||
| assert.Empty(t, stderr.String()) | ||
| }) | ||
| } | ||
| } |
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I'd force the interactive mode (tty + interactive) in this sub-command... I think there's no other user case to use it without an interactive session.